US4261406A - Expandable radial carcass spare tire - Google Patents

Expandable radial carcass spare tire Download PDF

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Publication number
US4261406A
US4261406A US06/043,384 US4338479A US4261406A US 4261406 A US4261406 A US 4261406A US 4338479 A US4338479 A US 4338479A US 4261406 A US4261406 A US 4261406A
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US
United States
Prior art keywords
tire
cables
sub
tread
fact
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US06/043,384
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English (en)
Inventor
Andre Chemizard
Jean-Baptiste Marc
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Compagnie Generale des Etablissements Michelin SCA
Original Assignee
Compagnie Generale des Etablissements Michelin SCA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Compagnie Generale des Etablissements Michelin SCA filed Critical Compagnie Generale des Etablissements Michelin SCA
Application granted granted Critical
Publication of US4261406A publication Critical patent/US4261406A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C3/00—Tyres characterised by the transverse section
    • B60C3/08—Tyres characterised by the transverse section collapsible into storage or non-use condition, e.g. space-saving spare tyres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C5/00—Inflatable pneumatic tyres or inner tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/005—Reinforcements made of different materials, e.g. hybrid or composite cords
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
    • B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
    • B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T152/00—Resilient tires and wheels
    • Y10T152/10—Tires, resilient
    • Y10T152/10009—Emergency

Definitions

  • the present invention relates to tires having a radial carcass reinforcement anchored to at least one bead ring in each bead and having a tread reinforcement formed of at least two plies of cables which are parallel in each ply and crossed from one ply to the other and form acute angles with the longitudinal direction of the tire.
  • the invention concerns tires mounted on a wheel rim capable of taking up reduced space in deflated condition and of assuming their final axial width and diameter under the effect of the pressure of the inflation air, so as to serve as spare tires for replacement of tires forming normal equipment of a vehicle.
  • the tread plies constitute a nondeformable triangulated unit with the radial carcass reinforcement.
  • the object of the present invention is to manufacture a tire with a radial carcass reinforcement and a tread reinforcement, which tire can be unfolded radially by inflation, so as to form a radial tire which, after its expansion, has properties comparable to those of the customary radial tires which it is called upon to replace.
  • the solution consists, in principle, of providing a tread reinforcement which stretches in the longitudinal direction without contracting in the axial direction during the expanding of the tire as a result of the inflation pressure and therefore without subjecting the cables of the radial carcass reinforcement to compressive stresses.
  • a radial tire of the type in question is characterized by the fact that the plies of the tread reinforcement are reinforced with cables whose curve of relative elongation under tension presents two consecutive segments, a first segment extending from a relative elongation of zero up to a relative elongation of
  • the variation of the tensile force as a function of the elongation being low along the first segment and high along the second segment so that the cables, starting from the point of elongation a, have the tensile strength of ordinary cables.
  • R 0 is the radius of the tread reinforcement of the unexpanded (noninflated) tire and R 1 that of the tire expanded (inflated) to its profile of use;
  • ⁇ 0 is the acute angle of the cables of the tread ply with respect to the longitudinal direction of the tire when the tire is unexpanded and ⁇ 1 is the same angle when the tire is expanded.
  • the cables of the tread reinforcement have reached the above relative elongation a and a customary stiffness.
  • the tread reinforcement while stretching by a length 2 ⁇ (R 1 -R 0 ) has retained the width which it occupied initially when its radius was equal to R 0 .
  • FIG. 1 shows schematically the relative longitudinal lengthening of the tread reinforcement without axial contraction thereof
  • FIG. 2 is a relative elongation diagram of a cable which is suitable for the present invention.
  • FIGS. 3 and 4 are radial or meridian cross sections or profiles of a tire in accordance with the invention before (FIG. 3) and after (FIG. 4) inflation, and
  • FIGS. 5 and 6 represent segments of cables of large initial relative elongation.
  • L 0 represents symbolically the length of the tread reinforcement of the tire in accordance with the invention in folded (unexpanded) condition
  • L 1 the length of the tread reinforcement under the pressure of use of the expanded tire.
  • the cables of the tread ply form an acute angle ⁇ 0 with the longitudinal direction of the tire; after expansion, the angle ⁇ 0 has become the angle ⁇ 1 .
  • the relative elongation a of a cable from the length l 0 to the length l 1 is equal to (sin ⁇ 0 /sin ⁇ 1 ).
  • ⁇ being the axial width of the tire tread, which is constant in accordance with the invention, one also has
  • segments 20 and 21 are linear, and the point a, F 1 is an angle point.
  • the two segments 20, 21 are slightly curved and the point a, F 1 is formed of a short strongly curved connecting segment 22, shown in dashed line.
  • Use may be made of metal cables of the elastic type produced by overtwisting and then undertwisting in order to impart to them a certain spacing, and of strands made from steel wires of small diameter, in accordance with U.S. Pat. Nos. 3,090,189 and 3,090,190.
  • ordinary steel cables 5 which have been undulated (FIG. 5) before forming plies therefrom by coating them by calendering with an elastomer.
  • cables 6 (FIG. 6) formed of a core 7 around which there has been helically wound an ordinary metal or textile reinforcing cable 8 with suitable pitch.
  • the core 7 can be so designed that it has a low rupture force.
  • the core 7 may be very stretchable, being for instance of polyamide. When the tire is expanded, this very stretchable core 7 winds itself around the cable 8.
  • the spare tire 10 of the invention can be vulcanized in accordance with the meridian profile shown in FIG. 3, which corresponds to the unexpanded (folded) condition of radius R 0 .
  • the spare tire 10 has a radial carcass reinforcement 12 anchored to bead rings 13.
  • the tread reinforcement is formed of two superposed plies 14, 15 of crossed wires or cables which form preferably equal angles with the longitudinal direction.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)
  • Ropes Or Cables (AREA)
US06/043,384 1978-06-05 1979-05-29 Expandable radial carcass spare tire Expired - Lifetime US4261406A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7816984A FR2427916A1 (fr) 1978-06-05 1978-06-05 Pneumatique de secours a carcasse radiale
FR7816984 1978-06-05

Publications (1)

Publication Number Publication Date
US4261406A true US4261406A (en) 1981-04-14

Family

ID=9209180

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/043,384 Expired - Lifetime US4261406A (en) 1978-06-05 1979-05-29 Expandable radial carcass spare tire

Country Status (13)

Country Link
US (1) US4261406A (it)
JP (1) JPS54159903A (it)
AU (1) AU523091B2 (it)
BE (1) BE876687A (it)
BR (1) BR7903537A (it)
CA (1) CA1100856A (it)
DE (1) DE2921822A1 (it)
ES (1) ES481180A1 (it)
FR (1) FR2427916A1 (it)
GB (1) GB2022033B (it)
IT (1) IT1118752B (it)
LU (1) LU81362A1 (it)
NL (1) NL178146C (it)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4343343A (en) * 1981-01-29 1982-08-10 The Goodyear Tire & Rubber Company Elongatable reinforcement cord for an elastomeric article
WO2000069661A1 (en) * 1999-05-18 2000-11-23 The Goodyear Tire & Rubber Company Runflat tire construction with ply cords having a variable modulus of elasticity
US6695025B1 (en) 1999-05-18 2004-02-24 The Goodyear Tire & Rubber Company Runflat tire construction with ply cords having a variable modulus of elasticity
WO2013048464A1 (en) * 2011-09-30 2013-04-04 Michelin Recherche Et Technique S.A. Methods and apparatus for deflecting and supporting a tire sidewall
US20140215793A1 (en) * 2011-07-13 2014-08-07 Michelin Recherche Et Technique S.A. Collapsible tire, method for collapsing same, and use thereof
US20150144272A1 (en) * 2012-05-24 2015-05-28 Michelin Recherche Et Technique, S.A. Foldable tire, method and use
US9193228B2 (en) 2011-01-31 2015-11-24 Michelin Recherche Et Technique S.A. Tire spreader for tire repair

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2912980B2 (ja) * 1990-11-14 1999-06-28 住友ゴム工業株式会社 空気入りラジアルタイヤ
DE4135599C2 (de) * 1991-10-29 1994-11-03 Continental Ag Fahrzeugluftreifen
US20130146200A1 (en) * 2011-12-13 2013-06-13 Walter Kevin Westgate Overlay ply for a pneumatic tire

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1388382A (en) * 1921-02-10 1921-08-23 Fred A Schwartz Mold for pneumatic-tire tubes
US3090189A (en) * 1957-03-30 1963-05-21 Michelin & Cie Elastic wire cables
US3404720A (en) * 1964-08-14 1968-10-08 Dunlop Rubber Co Cured elastomeric articles
US3486546A (en) * 1967-12-15 1969-12-30 Goodrich Co B F Pneumatic tire
US3540510A (en) * 1967-10-16 1970-11-17 Goodyear Tire & Rubber Flexible casing pneumatic tire
US3756883A (en) * 1971-06-04 1973-09-04 Firestone Tire & Rubber Co Flat band method of making radial tires

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB366636A (en) * 1930-11-28 1932-02-11 Dunlop Rubber Co Improvements in and relating to pneumatic tyres and the manufacture thereof
US3347964A (en) * 1966-01-19 1967-10-17 Goodrich Co B F Method and apparatus for making a pneumatic tire
US3394750A (en) * 1966-07-28 1968-07-30 Goodrich Co B F Pneumatic expansible tire having resilient folding sidewalls
US3455100A (en) * 1967-09-26 1969-07-15 Goodrich Co B F Reinforcement for elastomeric articles
DE1780010A1 (de) * 1968-07-23 1972-01-05 Continental Gummi Werke Ag Luftreifen,insbesondere Reserveluftreifen
US4057091A (en) * 1976-04-07 1977-11-08 The Firestone Tire & Rubber Company Pneumatic tire

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1388382A (en) * 1921-02-10 1921-08-23 Fred A Schwartz Mold for pneumatic-tire tubes
US3090189A (en) * 1957-03-30 1963-05-21 Michelin & Cie Elastic wire cables
US3090190A (en) * 1957-03-30 1963-05-21 Michelin & Cie Elastic cables
US3404720A (en) * 1964-08-14 1968-10-08 Dunlop Rubber Co Cured elastomeric articles
US3540510A (en) * 1967-10-16 1970-11-17 Goodyear Tire & Rubber Flexible casing pneumatic tire
US3486546A (en) * 1967-12-15 1969-12-30 Goodrich Co B F Pneumatic tire
US3756883A (en) * 1971-06-04 1973-09-04 Firestone Tire & Rubber Co Flat band method of making radial tires

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4343343A (en) * 1981-01-29 1982-08-10 The Goodyear Tire & Rubber Company Elongatable reinforcement cord for an elastomeric article
WO2000069661A1 (en) * 1999-05-18 2000-11-23 The Goodyear Tire & Rubber Company Runflat tire construction with ply cords having a variable modulus of elasticity
US6695025B1 (en) 1999-05-18 2004-02-24 The Goodyear Tire & Rubber Company Runflat tire construction with ply cords having a variable modulus of elasticity
US9193228B2 (en) 2011-01-31 2015-11-24 Michelin Recherche Et Technique S.A. Tire spreader for tire repair
US10081222B2 (en) 2011-01-31 2018-09-25 Compagnie Generale Des Etablissements Michelin Tire spreader for tire repair
US20140215793A1 (en) * 2011-07-13 2014-08-07 Michelin Recherche Et Technique S.A. Collapsible tire, method for collapsing same, and use thereof
US9840112B2 (en) * 2011-07-13 2017-12-12 Compagnie Generale Des Etablissements Michelin Collapsible tire, method for collapsing same, and use thereof
WO2013048464A1 (en) * 2011-09-30 2013-04-04 Michelin Recherche Et Technique S.A. Methods and apparatus for deflecting and supporting a tire sidewall
US20140248825A1 (en) * 2011-09-30 2014-09-04 Michelin Recherche Et Technique S.A. Methods and apparatus for deflecting and supporting a tire sidewall
US9387635B2 (en) * 2011-09-30 2016-07-12 Michelin Recherche Et Technique S.A. Methods and apparatus for deflecting and supporting a tire sidewall
US20150144272A1 (en) * 2012-05-24 2015-05-28 Michelin Recherche Et Technique, S.A. Foldable tire, method and use
US9889704B2 (en) * 2012-05-24 2018-02-13 Compagnie Generale Des Etablissements Michelin Foldable tire, method and use

Also Published As

Publication number Publication date
GB2022033A (en) 1979-12-12
NL178146C (nl) 1989-09-18
JPS54159903A (en) 1979-12-18
FR2427916A1 (fr) 1980-01-04
AU4773479A (en) 1979-12-13
NL7904371A (nl) 1979-12-07
LU81362A1 (fr) 1979-09-11
BE876687A (fr) 1979-09-17
BR7903537A (pt) 1980-01-22
DE2921822C2 (it) 1991-03-14
GB2022033B (en) 1982-10-13
DE2921822A1 (de) 1979-12-06
IT1118752B (it) 1986-03-03
CA1100856A (en) 1981-05-12
AU523091B2 (en) 1982-07-08
NL178146B (nl) 1985-09-02
FR2427916B1 (it) 1980-09-19
ES481180A1 (es) 1979-11-16
IT7968201A0 (it) 1979-06-04

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